HDRenderPipeline: Move variables in correct cbuffer

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Unlit/UnlitProperties.hlsl

-float4  _UnlitColor;
-TEXTURE2D(_UnlitColorMap);
-SAMPLER(sampler_UnlitColorMap);
-float4 _UnlitColorMap_ST;
-
-float3 _EmissiveColor;
+TEXTURE2D(_UnlitColorMap);
+SAMPLER(sampler_UnlitColorMap);
+
+
+CBUFFER_START(_PerMaterial)
+
+float4  _UnlitColor;
+float4 _UnlitColorMap_ST;
+
+float3 _EmissiveColor;
 float4 _EmissiveColorMap_ST;
 
 float _EmissiveIntensity;
 // In our case we don't use such a mechanism but need to keep the code quiet. We declare the value and always enable it.
 // TODO: Fix the code in legacy unity so we can customize the behavior for GI
 float3 _EmissionColor;
+
+CBUFFER_END

ScriptableRenderPipeline/HDRenderPipeline/HDRP/ShaderVariables.hlsl

 // As I haven't change the variables name yet, I simply don't define anything, and I put the transform function at the end of the file outside the guard header.
 // This need to be fixed.
 
-#if defined (DIRECTIONAL_COOKIE) || defined (DIRECTIONAL)
-    #define USING_DIRECTIONAL_LIGHT
-#endif
-
 #if defined(UNITY_SINGLE_PASS_STEREO) || defined(UNITY_STEREO_INSTANCING_ENABLED) || defined(UNITY_STEREO_MULTIVIEW_ENABLED)
     #define USING_STEREO_MATRICES
 #endif
 
 // ----------------------------------------------------------------------------
 
-CBUFFER_START(UnityPerDraw : register(b0))
-#ifdef UNITY_USE_PREMULTIPLIED_MATRICES
-    float4x4 glstate_matrix_mvp;
-    float4x4 glstate_matrix_modelview0;
-    float4x4 glstate_matrix_invtrans_modelview0;
-#endif
+CBUFFER_START(UnityPerDraw)
 
     float4x4 unity_ObjectToWorld;
     float4x4 unity_WorldToObject;
     // This contain occlusion factor from 0 to 1 for dynamic objects (no SH here)
     float4 unity_ProbesOcclusion;
 
+    // Velocity
+    float4x4 unity_MatrixPreviousM;
+    float4x4 unity_MatrixPreviousMI;
+    //X : Use last frame positions (right now skinned meshes are the only objects that use this
+    //Y : Force No Motion
+    //Z : Z bias value
+    float4 unity_MotionVectorsParams;
+
 CBUFFER_END
 
 #if defined(USING_STEREO_MATRICES)
 // TODO: Change code here so probe volume use only one transform instead of all this parameters!
 TEXTURE3D(unity_ProbeVolumeSH);
 SAMPLER(samplerunity_ProbeVolumeSH);
-
-CBUFFER_START(UnityVelocityPass)
-    float4x4 unity_MatrixNonJitteredVP;
-    float4x4 unity_MatrixPreviousVP;
-    float4x4 unity_MatrixPreviousM;
-	float4x4 unity_MatrixPreviousMI;
-    //X : Use last frame positions (right now skinned meshes are the only objects that use this
-    //Y : Force No Motion
-    //Z : Z bias value
-    float4 unity_MotionVectorsParams;
-CBUFFER_END
 
 // ----------------------------------------------------------------------------